Application of Pyrrolic Compounds in Analysis of Hydrocarbon Migration and Recharging Regularities in Cainan Oilfield, Junggar Basin

Abstract

Abstract: Pyrrolic nitrogen-bearing compounds are used for trac ing crude migration and recharging processes of Jurassic Sangonghe reservoir inmajor blocks of Cainan oilfield, Junggar basin. In the pyrrolic compounds contain a great amount of alkycarbazoles, a lttle amount of bensocar-bozoles and ittle dibenzocarbazoles. Based on the ratio of 1 ,8-dimethy lcarbazole/ 2,4-dimethy lcarbazole, C,-carbazole/C,-carbazole, G1/G3and the relative amounts of ankycarbazoles and alky benzocarbazoles, it is suggested that there exist different recharging regularities in bothsides of faulting along Well Cai-001-Well Cai-007 in eastern block of Cainan oilfield: in the east side, oils recharged into reservoir from southand north directions, and migrated towards W ell Cai- 1001 and Well Cai-006; in the west side, oil recharged into reservoir just from south direc-tion, and entered into center of the fault-nose uplift followed by recharging towards west structural highs along passage of the fault.

Key words: Junggar basin, Cainan oilfield, Jurassic, hy drocarbon migration, pyrrolic compounds, recharge

CLC Number:

WANG Chuan-gangl, WANG Tie-guan, XIE Ming-liang, YAO Ai-guo, WANG Jun-huai, LIU Hong-wei. Application of Pyrrolic Compounds in Analysis of Hydrocarbon Migration and Recharging Regularities in Cainan Oilfield, Junggar Basin[J]. Xinjiang Petroleum Geology, 2004, 25(1): 61-64.

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